Eric Dumazet 79d8665b95 tcp: fix return value for partial writes ... After my commit, tcp_sendmsg() might restart its loop after processing socket backlog. If sk_err is set, we blindly return an error, even though we copied data to user space before. We should instead return number of bytes that could be copied, otherwise user space might resend data and corrupt the stream. This might happen if another thread is using recvmsg(MSG_ERRQUEUE) to process timestamps. Issue was diagnosed by Soheil and Willem, big kudos to them ! Fixes: d41a69f1d3 ("tcp: make tcp_sendmsg() aware of socket backlog") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Tested-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-11-03 16:12:06 -04:00
..
netfilter	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-09-25 23:34:19 +02:00
af_inet.c	inet: fix sleeping inside inet_wait_for_connect()	2016-11-03 15:18:07 -04:00
ah4.c
arp.c
cipso_ipv4.c
datagram.c
devinet.c	netconf: add a notif when settings are created	2016-09-01 15:18:08 -07:00
esp4.c
fib_frontend.c	switchdev: remove FIB offload infrastructure	2016-09-28 04:48:00 -04:00
fib_lookup.h
fib_rules.c	switchdev: remove FIB offload infrastructure	2016-09-28 04:48:00 -04:00
fib_semantics.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-09-12 15:52:44 -07:00
fib_trie.c	switchdev: remove FIB offload infrastructure	2016-09-28 04:48:00 -04:00
fou.c	net: add recursion limit to GRO	2016-10-20 14:32:22 -04:00
gre_demux.c
gre_offload.c	net: add recursion limit to GRO	2016-10-20 14:32:22 -04:00
icmp.c
igmp.c
inet_connection_sock.c
inet_diag.c	net: inet: diag: expose the socket mark to privileged processes.	2016-09-08 16:13:09 -07:00
inet_fragment.c
inet_hashtables.c	net: Require exact match for TCP socket lookups if dif is l3mdev	2016-10-17 10:17:05 -04:00
inet_timewait_sock.c
inetpeer.c
ip_forward.c	ipv4: allow local fragmentation in ip_finish_output_gso()	2016-11-03 16:10:26 -04:00
ip_fragment.c
ip_gre.c	net/ip_tunnels: Introduce tunnel_id_to_key32() and key32_to_tunnel_id()	2016-09-10 20:53:55 -07:00
ip_input.c	net: VRF: Pass original iif to ip_route_input()	2016-09-16 04:24:07 -04:00
ip_options.c
ip_output.c	ipv4: allow local fragmentation in ip_finish_output_gso()	2016-11-03 16:10:26 -04:00
ip_sockglue.c	udp: fix IP_CHECKSUM handling	2016-10-26 17:33:22 -04:00
ip_tunnel_core.c	ipv4: allow local fragmentation in ip_finish_output_gso()	2016-11-03 16:10:26 -04:00
ip_tunnel.c	ip_tunnel: add collect_md mode to IPIP tunnel	2016-09-17 10:13:07 -04:00
ip_vti.c	vti: use right inner_mode for inbound inter address family policy checks	2016-09-09 09:02:08 +02:00
ipcomp.c
ipconfig.c	net: ipconfig: Fix NULL pointer dereference on RARP/BOOTP/DHCP timeout	2016-08-22 21:04:41 -07:00
ipip.c	ip_tunnel: add collect_md mode to IPIP tunnel	2016-09-17 10:13:07 -04:00
ipmr.c	ipv4: allow local fragmentation in ip_finish_output_gso()	2016-11-03 16:10:26 -04:00
Kconfig	tcp_bbr: add BBR congestion control	2016-09-21 00:23:01 -04:00
Makefile	tcp_bbr: add BBR congestion control	2016-09-21 00:23:01 -04:00
netfilter.c
ping.c	udp: must lock the socket in udp_disconnect()	2016-10-20 14:45:52 -04:00
proc.c	net: Suppress the "Comparison to NULL could be written" warnings	2016-09-30 01:50:45 -04:00
protocol.c
raw.c	udp: must lock the socket in udp_disconnect()	2016-10-20 14:45:52 -04:00
route.c	net: ipv4: Do not drop to make_route if oif is l3mdev	2016-10-13 12:05:26 -04:00
syncookies.c
sysctl_net_ipv4.c	ipv4: use the right lock for ping_group_range	2016-10-22 16:23:12 -04:00
tcp_bbr.c	tcp_bbr: add BBR congestion control	2016-09-21 00:23:01 -04:00
tcp_bic.c
tcp_cdg.c	tcp: cdg: rename struct minmax in tcp_cdg.c to avoid a naming conflict	2016-09-21 00:22:59 -04:00
tcp_cong.c	tcp: new CC hook to set sending rate with rate_sample in any CA state	2016-09-21 00:23:01 -04:00
tcp_cubic.c
tcp_dctcp.c	dctcp: avoid bogus doubling of cwnd after loss	2016-10-31 15:16:28 -04:00
tcp_diag.c	net: diag: Fix refcnt leak in error path destroying socket	2016-08-23 23:11:36 -07:00
tcp_fastopen.c	tcp: fastopen: avoid negative sk_forward_alloc	2016-09-08 16:08:10 -07:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-02 22:20:41 -04:00
tcp_ipv4.c	tcp: do not export sysctl_tcp_low_latency	2016-10-19 11:12:41 -04:00
tcp_lp.c
tcp_metrics.c	tcp: make nla_policy const	2016-09-01 14:09:01 -07:00
tcp_minisocks.c	tcp: track application-limited rate samples	2016-09-21 00:23:00 -04:00
tcp_nv.c
tcp_offload.c	gso: Support partial splitting at the frag_list pointer	2016-09-19 20:59:34 -04:00
tcp_output.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-02 22:20:41 -04:00
tcp_probe.c
tcp_rate.c	tcp: export data delivery rate	2016-09-21 00:23:00 -04:00
tcp_recovery.c
tcp_scalable.c
tcp_timer.c	tcp: Change txhash on every SYN and RTO retransmit	2016-09-28 07:52:34 -04:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c	tcp: cwnd does not increase in TCP YeAH	2016-09-08 17:16:12 -07:00
tcp.c	tcp: fix return value for partial writes	2016-11-03 16:12:06 -04:00
tunnel4.c
udp_diag.c	net: inet: diag: expose the socket mark to privileged processes.	2016-09-08 16:13:09 -07:00
udp_impl.h
udp_offload.c	net: add recursion limit to GRO	2016-10-20 14:32:22 -04:00
udp_tunnel.c
udp.c	udp: fix IP_CHECKSUM handling	2016-10-26 17:33:22 -04:00
udplite.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-08-30 00:54:02 -04:00
xfrm4_input.c
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-09-12 15:52:44 -07:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c